Cannot find this via google search, but maybe you guys can help me. Is there a place I can find the additive limits for API SP? Zinc, phosphorus, etc.
What are the additive limits for API SP?
- Thread starter Klutch9
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For all Resource conserving grades phosphorous is limited to 800ppm, in dual rated diesel oils that are dual rated SP with either CK-4 or FA-4 have to comply with the 800ppm limit. For passenger car lubricants that are not dual rated non resource conserving grades have no limits.
For instance Penrite HPR10 10W50 API SP has 1060 ppm and 970ppm phos.
Depends on the grade. Limits are higher for heavier grades.
https://www.infineuminsight.com/media/plej3mim/inf_api_2024_online_5-28-24.pdf
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